Chapter 22, Problem 46R

To determine

To Interpret:The line (red or blue) that represents a base that is being neutralized by an acid.

Explanation of Solution

Introduction:

Theneutralization graph is provided in the question.The graph illustrates two acid-base neutralization reactions.

In the given neutralization graph, the x-axis represents the volume of acid and base added to each other and the y-axis represents the pH change on addition of acid to base or base to acid.

From the graph, it can be seen that the two lines red and blue intersect at pH 7.

A base has pH greater than 7 and an acid has a pH less than 7.

From the graph, it can be predicted that the red line represents the base being neutralized by the acid, as its pH that is initially 14 decreases with addition of acid.

Conclusion: The redline represents a base that is being neutralized by an acid, as the line shows a decrease in pH.